package servlet;

import model.Goods;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import service.GoodsService;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.SQLException;
import java.util.Date;
import java.util.List;

@WebServlet("/admin/goods_edit")
public class AdminGoodsEditServlet extends HttpServlet {

    private GoodsService goodsService = new GoodsService();

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("utf-8");

        DiskFileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);
        try {
            List<FileItem> list = upload.parseRequest(req);
            Goods g = new Goods();
            int pageNo = 1;
            int type = 0;
            for (FileItem item : list) {
                if (item.isFormField()) {
                    switch (item.getFieldName()) {
                        case "id":
                            g.setId(Integer.parseInt(item.getString("utf-8")));
                            break;
                        case "name":
                            g.setName(item.getString("utf-8"));
                            break;
                        case "price":
                            g.setPrice(Float.parseFloat(item.getString("utf-8")));
                            break;
                        case "stock":
                            g.setStock(Integer.parseInt(item.getString("utf-8")));
                            break;
                        case "intro":
                            g.setIntro(item.getString("utf-8"));
                            break;
                        case "cover":
                            g.setCover(item.getString("utf-8"));
                            break;
                        case "image1":
                            g.setImage1(item.getString("utf-8"));
                            break;
                        case "image2":
                            g.setImage2(item.getString("utf-8"));
                            break;
                        case "typeid":
                            g.setTypeid(Integer.parseInt(item.getString("utf-8")));
                            break;
                        case "pageNo":
                            pageNo = Integer.parseInt(item.getString("utf-8"));
                            break;
                        case "type":
                            type = Integer.parseInt(item.getString("utf-8"));
                            break;
                    }
                } else {
                    if (item.getInputStream().available() <= 0) {
                        continue;
                    }

                    String fileName = item.getName();
                    fileName = fileName.substring(fileName.lastIndexOf("."));
                    fileName = "/" + new Date().getTime() + fileName;

                    String path = this.getServletContext().getRealPath("/picture") + fileName;

                    InputStream inputStream = item.getInputStream();
                    FileOutputStream outputStream = new FileOutputStream(path);

                    byte[] buffer = new byte[1024];
                    int len = 0;
                    while ((len = inputStream.read(buffer)) > 0) {
                        outputStream.write(buffer, 0, len);
                    }
                    inputStream.close();
                    outputStream.close();
                    item.delete();
                    switch (item.getFieldName()) {
                        case "cover":
                            g.setCover("/picture" + fileName);
                            break;
                        case "image1":
                            g.setImage1("/picture" + fileName);
                            break;
                        case "image2":
                            g.setImage2("/picture" + fileName);
                            break;
                    }
                }
            }
            goodsService.update(g);
            req.getRequestDispatcher("/admin/goods_list?pageNo=" + pageNo + "&type=" + type).forward(req, resp);
        } catch (FileUploadException e) {
            e.printStackTrace();
        }

        resp.getWriter().append("Served at:").append(req.getContextPath());
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}